knowing, clever, mischievous
principal; primary
To form into an arch shape.
To cover with an arch or arches.
An architectural element having the shape of an arch
An inverted U shape.
Any place covered by an arch; an archway.
Curved part of the bottom of a foot.
A natural arch-shaped opening in a rock mass.
An arch-shaped arrangement of trapezoidal stones, designed to redistribute downward force outward.
Behaving in a foolish, frivolous, or uncomprehending manner as a ruse for concealing clever deeds or deeper intentions.